@fabiscafe oh i agree, working asynchronously with office without the whole MS Stack is the worst kind of all...
just as a tip: openoffice / libreoffice can save files as a plain text xml which should be much more easier to merge than their proprietary alternatives...

hedgedoc got renamed from codimd but there are a lot of pad alternatives out there... I mean of course they arent built to work together on a document and therefore you probably cant use it for your everyday work...

But all those pads are the best solution for things like protocols, notes, brainstorming or just ideas...